A:
Positive:
1 x 3863578117 x 227269353 x 728977137 x 282013313 x 123437901 x 428812329 x 165895321 x 7261
Negative:
-1 x -38635781-17 x -2272693-53 x -728977-137 x -282013-313 x -123437-901 x -42881-2329 x -16589-5321 x -7261
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 38,635,781, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 38,635,781 | |
| -1 | -38,635,781 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,635,781.
Example:
1 x 38,635,781 = 38,635,781
and
-1 x -38,635,781 = 38,635,781
Notice both answers equal 38,635,781
With that explanation out of the way, let's continue. Next, we take the number 38,635,781 and divide it by 2:
38,635,781 ÷ 2 = 19,317,890.5
If the quotient is a whole number, then 2 and 19,317,890.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 38,635,781 | |
| -1 | -38,635,781 |
Now, we try dividing 38,635,781 by 3:
38,635,781 ÷ 3 = 12,878,593.6667
If the quotient is a whole number, then 3 and 12,878,593.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 38,635,781 | |
| -1 | -38,635,781 |
Let's try dividing by 4:
38,635,781 ÷ 4 = 9,658,945.25
If the quotient is a whole number, then 4 and 9,658,945.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 38,635,781 | |
| -1 | 38,635,781 |
If you did it right, you will end up with this table:
| 1 | 17 | 53 | 137 | 313 | 901 | 2,329 | 5,321 | 7,261 | 16,589 | 42,881 | 123,437 | 282,013 | 728,977 | 2,272,693 | 38,635,781 |
| -1 | -17 | -53 | -137 | -313 | -901 | -2,329 | -5,321 | -7,261 | -16,589 | -42,881 | -123,437 | -282,013 | -728,977 | -2,272,693 | -38,635,781 |
Here are some more numbers to try:
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